Create a perpetual motion machine that continuously takes your marbles back to the top to launch again! MOTORIZED LIFT FOR ENDLESS RUNS - Features a motorized lift that carries your marbles up almost 20 inches and drop them onto the track! 150-PIECE KIT FOR MASSIVE MAZES - With 106 construction pieces, 30 marbles, and the 14-piece spiral lift, you get everything you need to create endless configurations of marble runs!